A file is appearing in System Information but is nowhere to be found in my computer

Hey everyone,

I'm running Catalina 10.15.7 on my late-2014 27 inch iMac. I am clearing out old files to open up hard drive space using System Information. I navigated there by selecting About This Mac > Storage > Manage. I found that the largest file on my computer is a game I had purchased on Steam. It's Portal 2, taking up 12.78 GB. I pressed Delete, but the file is still there. I followed the file path and it isn't in the folder it says it's in. If I press "Show In Finder" nothing pops up. When I right-click the file, Delete is also greyed out.

So it's behaving as though the file is gone, but System Information is telling me it's still there. I have cleared the trash and restarted the computer. Does anyone have any ideas on how to get this file out of my computer? Is this just a glitch within System Information, and it isn't actually there anymore taking up space?

Thanks!